Why do wrong people always post on these forums?
Here's the tooltip....
http://www.wowhead.com/?spell=53301
Explosive Shot Rank 1
10% of base mana 5 - 35 yd range
Instant cast 6 sec cooldown
Requires Ranged Weapon
You fire an explosive charge into the enemy target, dealing [RAP * 0.14 + 144]-[RAP * 0.14 + 172] Fire damage.
The charge will blast the target every second for an additional 2 sec.
NOTICE THE BOLDED PART
That is 2 seconds that you have to wait before you fire your next explosive shot, or you are clipping your charges and costing yourself MASSIVE dps (yes this right here is why you are bad, and why that other hunter in your guild always out-dps's you, so take notes). This means that each tick is 1 second long, compared to a 1.5sec GCD. If you fire another shot in between the first and second tick, you are only losing .5sec before you fire that 2nd shot, which really doesn't matter since you aren't losing the free shot anyway, and are gaining dps for that .5seconds you ARE using to fire the aimed shot. The wait time for all the ticks is longer than the GCD, and since the first ES doesn't start the GCD, you can fire the aimed shot almost as fast as you can hit it (or click it >.>) :P
In a 6 second span I've fired a, 3 tick Explosive shot (.5) - Aimed shot (2) - 3 tick explosive shot (3.5) - 3 tick explosive shot (5.5) - continuing regular rotation
YOU have fired a 1 tick Explosive shot (.5) - 1 tick explosive shot (1) - 1 tick explosive shot (1.5) - aimed shot - (3) - Continuing your regular rotation
So for arguments sake if every ES tick was 3k for both of us, and every AS was 2k I'd have done 29kdmg in just under 6 seconds
You'd have done 11k in 3 seconds then continued with your rotation which would have netted you another explosive shot at the 7.5second mark gaining you 20kdmg after 3 ticks at 9.5seconds
So for those bad with math I have 4833dps with the numbers used in this example, you have 2105dps.
You are bad, reroll noob. This goes for everyone else who has been arguing with me.